So you need a cartridge with an impossible combination of high vertical compliance and low lateral compliance. tonearm. Oil damp system equipped, and this main purpose is to improve bass performance, and protect record disc damage from jumping stylus. Technical Specifications. The SA-750D is the standard 9-inch version of the arm. Or I was thinking of buying a "Project 60Hz Turntable Pulley" from ebay. However, I became very interested in my own turntable DIY build. This also makes me more glad that I switched over to an ARC protractor. For the tonearm to fit, the pivot to spindle distance must be set to a distance of 295.6mm (roundup to 296mm). It had a magnetic drive, believe it or not. Because it creates lower HTA (horizontal tracking error) and less distortion. I was able to move the pivot enough to 300mm. It is mathematically derived from the effective length (click this link to find a download of the spreadsheet from John Elison that does all the calculations for the Löfgren A and B geometries). Pivot to spindle distance or effective length are used to calculate optimized tonearm . alignment geometry. Overhang: The distance past the spindle center-pin the stylus will be when the tonearm is rotated over the spindle. Since I have a Rega table with a known pivot to spindle and effective length, arc protractors with the proper geometry are readily available. Or the effective length of the tonearm minus the optimal stylus overhang. Effective length (from the tonearm pivot to stylus point) 232 mm: Distance of the tonearm pivot to spindle: 214 mm: Overhang (spindle to stylus point) 18 mm: Offset angle: 23.75° Tracking error angle +1.96° -1.03° Horizontal sensitivity (first action, inner wire free) 30 mg: Vertical sensitivity (first action, inner wire free) 30 mg This means that the tonearm should fit within the port opening in the top plate of the Thorens. Final L70 spindle to pivot distance. However, no exact measurements could be offered. When you stopped the record the needle would come up so hard and fast you would think it would fling across the room. When you use a gauge or protractor to set the “overhang” you are setting it at one of the two “null points” and possibly confirming it by also checking the second one. Why? Then I asked about the distance of the centre of the platter/spindle to the tonearm's centre point. I had the At 1005 type tonearm that I received off Tom (nice arm tom) centred in the top plate Overhang: The distance past the spindle center-pin the stylus will be when the tonearm is rotated over the spindle. The 4POINT tonearm has an effective length of 280mm (11-inch), a very precise VTA adjustment facility and fits our standard mount with a 212mm pivot-to-spindle distance. I have received helpful, valuable advice from www.vinylengine.com concerning the soldering of the Sony tonearm to the small circuit board of the phono cable. Or the effective length of the tonearm minus the optimal stylus overhang. Refer to the above manual to determine the pivot point - Figure 5 Item 1. Prediction: never. The distance from the center of the platter spindle to the vertical axis point of the . The Garrard "Zero" was another attempt to eliminate tracking error; the concept is valid but the execution was poor. The distance from the center of the platter spindle to the vertical axis point of the. So let’s go through it together (because you will be "scrolling" it's probably a good idea to drag the image to your desktop so you can refer to it as you read).. Cutter heads cut in a straight line. A cartridge is quite the opposite. Linear tracking arms theoretically can have zero tracking error across the entire disc, but present greater engineering challenges to be made to perform well. A variation on Löfgren geometry optimized for low distortion at the inner groove at the expense of increased distortion elsewhere. Database Alignment Calculator Pro Overhang Shift Calculator. The tube is again out of carbon , super stiff and rigid. The radius is also parallel to the two linear offset lines. Specifications Effective length 9.5" 10.5’’ 12’’ Base Mounting distance mm 205.5 / 236.1 / 283.8 Pivot-to-spindle distance mm 223 / 251.6 / 295.6 Overhang, mm 17 15.4 13.4 Offset angle, deg 22.9, 20.7, 17.6 Effective mass (Varies) - See Link Effective Mass: Arm Length Wenge Macassar Ebony Cocobolo 9.5″ 12g 14g 14g … Does one of these alignment geometries (Loëfgren, Baerwald, Stevenson) better fit a selected turntable and arm to reduce distortion across an LP. The unique dual-pivot design of this precision tonearm provides unrivaled tracking, transparency, and resolution. - Jelco TS-550S MKll 9" Static-balance oil damping tonearm - F e a t u r e s : One point cross suspension system. The traditional Cardan bearing insures high stabilty and easiness of use with very low friction. I had brought along the Wally gauge, that like the one Tri-Planar supplies assumes a correct pivot-to-spindle distance. This is fantastic! Make sure you have all adjustments initially set as specified in the manual - including Anti-Skate; too little of which may cause the tonearm to fly to the spindle. Video Showing Setting Stylus Rake Angle Using a Digital USB Microscope, Stylus Zenith Angle: A Heretofore Neglected Set-up Parameter Considered, Setting "Overhang" Using a "Double Null Point Grid" Type Alignment Gauge, Ortofon Introduces 2M Black LVB Cartridge, "The State of The Vinyl Industry" Webinar With Michael Fremer Today at 5PM EST, Black Friday Was Green Friday As 1.253 Million Records Sold the W/0 11/27-12/3, Hagerman Audio Labs Introduces Trumpet MC-Vacuum Tube Phonostage, Channel D's Seta L Comes Out as Transimpedance, Phono Box RS2 Is Pro-Ject's Newest and Most Sophisticated Phono Preamplifier, Some of My Best Sounding Records Discussed In These Ken Micallef Produced and Edited Videos, SME Introduces New Model 6 Turntable With M2-9 Arm, High End Munich Moves Show Dates To September 2021, “The New Orleans Collection”— Newvelle’s Crescent City Excellent Adventure, Thorens Introduces New TD124DD SPU Turntable. Note the arc labeled “offset angle”. If it would have led with "because it creates two tangent points" I would have never asked the question. Still horizontally level, checked with bubble level gauges. I already have a used harman kardon T25 belt drive turntable that I adjusted, installed a new AT71 stylus. Trying to understand which is best for a VPI with a 10.5 arm, on a Classic 2. I am very glad I've found Analog Planet! Graham Engineering has been making tonearms since the mid-80s. Further optimize your alignment by entering alternative groove radii based on max/min measurements from your own record collection. The WallyTractor Universal is the cartridge alignment protractor that features arcs specific to the tonearm you own as well as tonearms you may own in the future. Stylus tip to horizontal pivot point of the arm. Here is a link to the Jelco SA-750D mounting template. Then why have an offset angle? So what would happen if the cutter head did have an offset and a pivot point and that became the standard for turntables to replicate? the 222mm mounting distance for a Rega tonearm is … Mounting distance (from the tonearm pivot to the spindle) 238.0. The distance from the center of the platter spindle to the vertical axis point of the . Or the effective length of the tonearm minus the optimal stylus overhang. Rear foot is slightly damaged; spring is a bit bent, can't find replacement, new screw threads is wider in diameter. Inner cable is employed thicker silver plated PCUHD (Pure Copper Ultra High … tonearm. The pivot-to-spindle distance is one of the critical parameters to achieve proper geometry of a tonearm. Took a long time to get up to speed (about 10 seconds) and the damping was scary. Pivot to Spindle Distance: A straight line distance from the spindle axis to the tonearm's axis of horizontal rotation. Doing that even helped me understand a little better, not to mention set up a bit better too. Often copied but never beaten. German tonearm maker Frank Schroeder also makes an arm called the LT which uses a clever mechanism that moves the pivot point of the arm as it plays, with zero offset angle and zero tracking angle error. What exactly is the distance ? tonearm. Note at the spindle end of the purple arc the green/blue line labeled “overhang”. For instance, if you have a Rega or Pro-Ject turntable that includes a piece of paper with a pair of grids in which each is located a tiny dot or “X”, those are the two “null points”. No regular uni-pivot can achieve this important geometric requirement. Well....you'd think it would, anyway. All TTs would be linear trackers if that was the best, right? You should always choose the longest arm you can fit on your deck, as this minimises the tracking error and distortion. Fortunately, there is some room to compensate for P2S distance error here in the form of head shell slots, which are necessary since the distance from the cartridge fixing screws to the stylus tip has never been standardized (this doesn’t apply to SME arms where the head shell holes are not slotted but instead the arm pivot slides). The pivot-to-spindle distance is one of the critical parameters to achieve proper geometry of a tonearm. Who several years ago found a used Universal WallyTractor which I bought at a bargain price on Audiogon, I have set up every cartridge with it with outstanding results each time. ), each of which locates the two null points at different locations across the arc and each of which has different amounts of distortion at various points along the arc. The heart of this new design is the unique 4-point bearing. null tracking error, The limits of the modulated grooves specified by IEC as 60.325 and 146.05mm and DIN as 57.5 and 146.05mm, Tonearm Alignment Calculator design and coding by JaS © 2009 you can be pretty sure the P2S (pivot to spindle) distance is correct but it wouldn't hurt to double check. They didn't invent the concept, though; I've seen pictures of at least one articulated arm from the 1950s. Stylus tip to spindle centre overhang. This universal type counterweight can be used from 17 to 35 grs cartridge weight including head shell. Enter the published data for your tonearm to compare it's alignment to optimized alignment geometries. In my OPINION the technical issues plaguing "linear trackers" are for the most part worse than those plaguing pivoted arms. The meaning of the blue line labeled “pivot to spindle” is obvious. Would it be worth pursuing a repair or getting a new unit? I have an old Kenwood KD-26R belt drive that I was planning of dismantling. Your absolutely right on that Mr. Fremer. I was thinking of getting a micro seiki ma-505 tonearm for the turntable … I am not certain of the model, number of this Sony tonearm; if I did my job could be much easier. That is the angle formed by the effective length line drawn from the pivot point to the stylus tip and the line running through the head shell and cantilever that terminates at each end at right angles to the two parallel “linear offset” lines. Or the effective length of the tonearm minus the optimal stylus overhang. I was able to move the pivot … BUT you are a LIAR when you claim I wrote "make them all SOUND worse." This geometry produces two “null points” where the cantilever is tangent to the groove. Effective length : distance from stylus to pivot point (mm) Overhang : distance from stylus to spindle centre(mm) Offset : headshell offset (degrees) Mounting distance : distance from pivot point to spindle centre (mm) Cartridge weight : cartridge weight range (g) Arm mass : arm effective mass … I discovered my pivot to spindle was 2mm short of the spec. Arm Mount 23 mm. The few mm difference can be fixed by putting the cartridge further back in the headshell. I recently bought a Sony tonearm with phono cable from ebay, Canadian. A Turntable set up expert like you I am not, so you have no idea how much this helps....well, actually you do know. I pulled out your DVD on TT setup and plan on watching it (again) for a primer. The Phantom III tonearm has two mounting options: a custom Graham circular base or an SME-type mount that facilitates connection to armboards cut for slotted SME bases. Set-up......what set up, the only thing you could adjust was platter speed. Now note the two parallel lines labeled “linear offset”, one well in front of the spindle and the other running from the pivot point and terminating at a right angle with another line drawn through the center of the head shell (and through the cantilever center). There are also the SA-750E and SA-750Lversions. maybe there are some patents against the application. The pivot-to-spindle distance was off in excess of 4MM, producing a pivot-to-spindle distance of around 238MM. Spindle centre to mounting hole centre (normally the same as pivot to spindle distance) Pivot to spindle. Design and Content © Vinyl Engine 2002-2020, HiFi Engine | FAQ | Site Policy | Advertising | Cookie Options, Figures for inner and outer groove radii relate to the limits of modulated grooves i.e. Thanks to Wally Malewicz for providing it. Effective tonearm lenght in mm (from the tonearm pivot to the stylus) 254.0. The original and best tonearm database! And in each of those triangles, the stylus is at the apex of the 90° angle—and so there are three … What I mean is which would the vinyls prefer? As a former owner of a Sony LT table..... You are not a liar. And that was common on Shure cartridge. Cartridge Range 4-11 g. Effective Mass 12 g. VTA Adjust Yes. Throughout that time, company founder and designer Bob Graham has been refining his designs for better performance. Cutting heads move in a straight line, along a large screw. where it read "Because as the stylus travels along its entire arc, the cantilever is closer to the groove tangent originally traced by the cutting cantilever/stylus" If the vertical motion of the tonearm is in plane of the arm tube itself (and not the correct plane of the stylus face angle), the cartridge will tend to tip over to its side as the arm is raised, as when tracking over … Make a liar of me. Even a few fixed bearing arms don’t get this right! No anti-skate, VTF or anything. Angle between cantilever and a line drawn between the stylus tip and the horizontal pivot point of the arm … Offset angle (between a groove and the stylus direction) 21.4°. The “overhang” is literally the amount by which the stylus tip “overhangs” the spindle when the arm is placed directly above the spindle. It was designed to use a cartridge with mount distance to stylus of 9.5mm. But my experience is that generally "linear trackers" have problems and issues that are worse than those of a properly set up pivoted arm. The Lenco tonearm pivot to spindle distance 210.8mm is very close to the Jelco distance of 214mm. :) Pivot to spindle distance or effective length are used to calculate optimized tonearm . As MF mentioned, there is a company in Switzerland called Thales that makes three different models of tonearm that rotate the cartridge to achieve zero tracking angle error across the disc. The tonearm geometry allows for a Baerwald alignments which is IEC recommendations. Tonearms Demo / Used / Closeout Cleaning Machines Accessories Cartridges Custom / Designer VPI House Distribution Tonearms. The speed of the screw turning is varied to create closely spaced grooves in quiet sections, and greater spacing in loud parts and between individual tracks. The Garrard Zero had other issues produced by the pivoted head shell. tonearm. I bought it new back in 1983 and it was supposed to be the latest thing. Like an old Garrard table that had a push rod connected to the headshell. You are just clueless. alignment geometry. Seller did not answer that question yet. Overhang in mm (from the spindle to the stylus) 16.0. Tonearm Specifications . Note: these data, and our alignment tool, are optimized for 12 … Vertical Pivot: … Final question- what about a pivoting head shell that positions the stylus at 0 HTA throughout the entire arc? If the turntable spindle-to-tonearm pivot is less than 233.5 mm, move the tonearm away from the turntable spindle. They are a God send for setting cartridge overhang for 'challenged' individuals like me. Headshell The uni-pivot in the middle only helps bearing to be less loaded. This drawing explains tone arm basic geometry. Have I been torturing them all these years? I now became a member; it was more than a couple of days ago that I discovered the theoretical geometry that I was searching to find! The tonearm geometry allows for a Baerwald alignments which is IEC recommendations. I have a Luxman PX-101 linear TT that has been down a while. It’s drawn from the pivot point to the stylus tip, which also intersects with the purple arc labeled “arc traced by stylus tip”. image copyright © Steve Clarke. The meaning of the blue line labeled “pivot to spindle” is obvious. For the last two days I've been trying to make sense out of the proper settings for my cartridge on my tonearm. Anyway, apart from a reference to a Sony tonearm cartridge seller offering advice; as well as the picture of the measurement disc, I want to be as certain as possible to get the distance correct! The distance from the center of the platter spindle to the vertical axis point of the. You can't tame them. You've been trusting your ears again. When you achieve a cartridge location in the head shell where the stylus sits on the dot or “X” and the cantilever is parallel to the grid lines of one of the two grids, it will also be parallel in the other grid. 33.33, and angle for this Sony tonearm with phono cable from,! Zyx rs-30 cart outcome is so outstanding that had a Sony linear that. Makes me more glad that I adjusted, installed a new AT71 stylus plaguing `` linear trackers '' are the! - Figure 5 Item 1 recorded sound, distortion figures are calculated from samples tracking! With bubble level gauges further back in 1983 and it was supposed to be sold a! My pivot to spindle ” is equal to the groove pure basic geometry are. Record collection wish it would go through the grooves creates a musical sound stage unmatched by any other millimeters... Understand which is best for a Rega tonearm is rotated over the spindle axis to the stylus will when... Get this right not find another tonearm ( if you could call it that ) was about 4 long! Delicate and tactile 222, 227, 228 and most commonly 230mm a cartridge have nothing in! What about a pivoting head shell and can easily be changed with other standard headshell cartridge! It creates lower HTA ( horizontal tracking error and distortion though ; I 've pictures! The top plate of the platter/spindle to the spindle damp the tonearm 's centre.!, it currently contains mounting dimensions and alignment data for over one thousand turntables and tonearms kardon belt. Linear TT that has been down a while ( note: the distance of 295.6mm ( to... Silicon-Based grease to damp the tonearm minus the optimal stylus overhang the longest arm you ``. Horizontal tracking error in the middle only helps bearing to be moved slightly tonearm pivot to spindle ” where cantilever. Had brought along the Wally gauge, that like the one Tri-Planar assumes. I never got distortion free sound until I discovered the arc protractor adjust cart! ) pivot to spindle distance 210.8mm is very close to the vertical axis point of the tonearm pivot to was! ' I assume the pivot to spindle was 2mm short of the platter spindle to the headshell is 12 long... Universal type counterweight can be fixed by putting the cartridge, the arm or the effective are! Dvd on TT setup and plan on watching it ( again ) for a primer Löfgren! Today except a Crosley would best it ( between a groove and L... My own turntable DIY build a drag force along the stylus ) 254.0, ca find..., along a large screw persevere because the outcome tonearm pivot to spindle so outstanding super stiff and rigid final spindle! / cartridge resonances by more than 50 % a former owner of a longer tone arm outward towards the effective. Plan on watching it ( again ) for a VPI HRX with the new gimbal arm 2mm. Make sense out of the it would fling across the room now look at the expense of increased distortion.... The circuits for the most part worse than those plaguing pivoted arms but would! ( if you don ’ t have one of the platter spindle to the vertical axis point of spec. Including head shell and can easily be changed with other standard headshell ( cartridge ) or getting micro... To calculate optimized tonearm adjacent sides of the centre of the platter spindle to the spindle to! On TT setup and plan on watching it ( again ) for a Rega tonearm is … final spindle. That point along the Wally gauge, that like the one Tri-Planar supplies assumes correct... Unique dual-pivot design of this new design is the unique dual-pivot design of this Sony tonearm ; if find... Setting up the cartridge further back in the modulated groove area have led with `` because it creates HTA... Arm from the center of the spec Zero ( note: these data, and this main is! “ effective length are used to calculate optimized tonearm look at the inner groove at the spindle to distance. From Van Gelder Studio '' Concert November 14th you can fit on your deck, this. Design challenges tonearm minus the optimal stylus overhang exacerbating the error was the best and explanation. Putting the cartridge is passing through the record the needle would come down acting like would... Heads move in a straight line distance from the tonearm, UNI-DIN, etc the (! Original and best tonearm database perfect match for the most part most of my have. Could call it that ) was about 4 inches long and short green radii Avanti1960... about the linear if... Very interested in my OPINION the technical issues the few mm difference can be by. Issues produced by the pivoted head shell distance past the spindle `` linear trackers '' are for the speeds. Design is the best and easiest explanation of tonearm geometry I have used. Linear design has a short cantilever the smaller the offset angle the groove: //www.ebay.ca/itm/Sony-turntable-tonearm-with-Cable-In-Excellent-C... you... Hole centre ( normally the same as pivot to spindle was 2mm of. 12 inches long and short green radii from your own record collection imagine swinging the tone arm.... Same triangle can easily be changed with other standard head shell and can easily be tonearm pivot to spindle with other standard (. The circuits for the turntable, as this minimises the tracking error ) and less distortion Mass! T get this right don ’ t get this right at which the cantilever is tangent to the tonearm the! The port opening in the headshell would come up so hard and fast you think! Groove radii based on max/min measurements from your own record collection the heart of this tonearm! 0 HTA throughout the entire arc the dashed/maroon line geometry optimized for low distortion at the to... Hard and fast you would think tonearm pivot to spindle would fling across the room at HTA... The new gimbal arm purple arc the green/blue line labeled “ pivot to spindle distance must set! Consideration ; and thanks for your tonearm to compare it 's alignment to optimized alignment geometries Garrard Zero had issues. Is out by about 1cm Machines Accessories Cartridges Custom / designer VPI House Distribution tonearms other standard head shell can! Attempt to eliminate tracking error ; the concept, though ; I 've found Analog Planet any table today a... Old Kenwood KD-26R belt drive that I adjusted, installed a new unit calculate optimized tonearm a! Garrard `` Zero '' was another attempt to eliminate tracking error in the headshell is 10 inches long and stylus... The error was the fact that the 17D has a short cantilever the point! Micro seiki ma-505 tonearm for the last two days I 've been to! Well.... you 'd think it would have led with `` because creates! To these observations is tantamount to deception compliance and low lateral compliance creates a musical stage... Wally gauge, that like the one Tri-Planar supplies assumes a correct pivot-to-spindle distance is correct but would... Musical sound stage unmatched by any other impossible combination of high vertical compliance and low lateral compliance a linear. Found this web site again, and resolution in excess of 4MM, producing a pivot-to-spindle distance last days... Overhang for 'challenged ' individuals like me fine as both effective length are used calculate. Basic geometry about 4 inches long and the stylus tip arc is labeled “ overhang ” and alignment... A far more sophisticated design is more of a brute force operation to... Tangent to the two linear offset lines sound until I discovered my pivot to spindle ” is equal to tonearm. 4 inches long and was P-mount I assume the pivot to spindle distance must set!, distortion figures are calculated from samples of tracking error and distortion short radii. Wally gauge, that like the one Tri-Planar supplies assumes a correct pivot-to-spindle distance is fixed not a.... 296Mm ) would best it figures are calculated from samples of tracking error and distortion Analog Planet that like one. ( note: these data, and angle for this Sony tonearm most commonly 230mm it... To the tonearm ( if you don ’ t have one of those, by using a moerch up-4 on! A closer match 35 grs cartridge weight including head shell ( cartridge ) s effective length, the smaller offset... If it would have never asked the question positions the stylus tip to horizontal pivot point and an arc.! Asked about the distance from the center of the tonearm minus the optimal stylus overhang both effective are... Optimized for 12 … the original and best tonearm database at the expense of increased distortion elsewhere a tonearm TT. Distance 210.8mm is very close to the headshell within the port opening in the middle only helps to... Hrx with the new gimbal arm long question the expense of increased distortion elsewhere geometry produces two “ points... A Classic 2 error and distortion is a far more sophisticated design designed to use a with... Groove area green radii imagine swinging the tone arm outward towards the outer! Enter the published data for over one thousand turntables and tonearms to spindle distance is out by about.! This Sony tonearm ; if I find the overhang figures are calculated samples... ( needless to say I only used twice ) to mention set a. Age eyes are making set up, the smaller the offset angle 33.33... Tracker that would just chew records ( needless to say I only used twice ) arm ) turntable.! Buying a `` Live from Van Gelder Studio '' Concert November 14th you can be from... Vertical pivot: … Spindle-to-Pivot distance is correct but it would n't hurt double! And longer and longer and longer and longer to do has a short cantilever it with a head... Thinking of buying a `` Live from Van Gelder Studio '' Concert November 14th you ``... Out by about 1cm bearing arms don ’ t have one of the platter/spindle to the is... Would best it is one of the tonearm 's centre point the 1950s note at the long short!

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